If it is any of the builtin cluts then all you need to do is
gmic sample tiger map_clut summer output tiger.png
As for converting cluts, I think it was addressed in a few places in discuss but I can’t find it at the moment. Search came up with How to uncompress gmic_film_cluts.gmz ?.
PS
Toggle for list of builtin cluts.
{ 60's | 60's_faded | 60's_faded_alt | agfa_apx_100 | agfa_apx_25 | agfa_precisa_100 | agfa_ultra_color_100 | agfa_vista_200 | alien_green | analogfx_anno_1870_color | analogfx_old_style_i | analogfx_old_style_ii | analogfx_old_style_iii | analogfx_sepia_color | analogfx_soft_sepia_i | analogfx_soft_sepia_ii | black_and_white | bleach_bypass | blue_mono | color_rich | expired_fade | expired_polaroid | extreme | fade | faded | faded_alt | faded_analog | faded_extreme | faded_vivid | faux_infrared | fuji3510_constlclip | fuji3510_constlmap | fuji3510_cuspclip | fuji3513_constlclip | fuji3513_constlmap | fuji3513_cuspclip | fuji_160c | fuji_160c_+ | fuji_160c_++ | fuji_160c_- | fuji_400h | fuji_400h_+ | fuji_400h_++ | fuji_400h_- | fuji_800z | fuji_800z_+ | fuji_800z_++ | fuji_800z_- | fuji_astia_100f | fuji_fp-100c | fuji_fp-100c_+ | fuji_fp-100c_++ | fuji_fp-100c_+++ | fuji_fp-100c_++_alt | fuji_fp-100c_- | fuji_fp-100c_-- | fuji_fp-100c_cool | fuji_fp-100c_cool_+ | fuji_fp-100c_cool_++ | fuji_fp-100c_cool_- | fuji_fp-100c_cool_-- | fuji_fp-100c_negative | fuji_fp-100c_negative_+ | fuji_fp-100c_negative_++ | fuji_fp-100c_negative_+++ | fuji_fp-100c_negative_++_alt | fuji_fp-100c_negative_- | fuji_fp-100c_negative_-- | fuji_fp-3000b | fuji_fp-3000b_+ | fuji_fp-3000b_++ | fuji_fp-3000b_+++ | fuji_fp-3000b_- | fuji_fp-3000b_-- | fuji_fp-3000b_hc | fuji_fp-3000b_negative | fuji_fp-3000b_negative_+ | fuji_fp-3000b_negative_++ | fuji_fp-3000b_negative_+++ | fuji_fp-3000b_negative_- | fuji_fp-3000b_negative_-- | fuji_fp-3000b_negative_early | fuji_fp_100c | fuji_ilford_delta_3200 | fuji_ilford_delta_3200_+ | fuji_ilford_delta_3200_++ | fuji_ilford_delta_3200_- | fuji_ilford_hp5 | fuji_ilford_hp5_+ | fuji_ilford_hp5_++ | fuji_ilford_hp5_- | fuji_neopan_1600 | fuji_neopan_1600_+ | fuji_neopan_1600_++ | fuji_neopan_1600_- | fuji_neopan_acros_100 | fuji_provia_100f | fuji_provia_400f | fuji_provia_400x | fuji_sensia_100 | fuji_superia_100 | fuji_superia_100_+ | fuji_superia_100_++ | fuji_superia_100_- | fuji_superia_1600 | fuji_superia_1600_+ | fuji_superia_1600_++ | fuji_superia_1600_- | fuji_superia_200 | fuji_superia_200_xpro | fuji_superia_400 | fuji_superia_400_+ | fuji_superia_400_++ | fuji_superia_400_- | fuji_superia_800 | fuji_superia_800_+ | fuji_superia_800_++ | fuji_superia_800_- | fuji_superia_hg_1600 | fuji_superia_reala_100 | fuji_superia_x-tra_800 | fuji_velvia_50 | fuji_xtrans_ii_astia_v2 | fuji_xtrans_ii_classic_chrome_v1 | fuji_xtrans_ii_pro_neg_hi_v2 | fuji_xtrans_ii_pro_neg_std_v2 | fuji_xtrans_ii_provia_v2 | fuji_xtrans_ii_velvia_v2 | generic_fuji_astia_100 | generic_fuji_provia_100 | generic_fuji_velvia_100 | generic_kodachrome_64 | generic_kodak_ektachrome_100_vs | golden | golden_bright | golden_fade | golden_mono | golden_vibrant | goldfx_bright_spring_breeze | goldfx_bright_summer_heat | goldfx_hot_summer_heat | goldfx_perfect_sunset_01min | goldfx_perfect_sunset_05min | goldfx_perfect_sunset_10min | goldfx_spring_breeze | goldfx_summer_heat | green_mono | hong_kong | ilford_delta_100 | ilford_delta_3200 | ilford_delta_400 | ilford_fp4_plus_125 | ilford_hp5_plus_400 | ilford_hps_800 | ilford_pan_f_plus_50 | ilford_xp2 | kodak2383_constlclip | kodak2383_constlmap | kodak2383_cuspclip | kodak2393_constlclip | kodak2393_constlmap | kodak2393_cuspclip | kodak_bw_400_cn | kodak_e-100_gx_ektachrome_100 | kodak_ektachrome_100_vs | kodak_elite_100_xpro | kodak_elite_chrome_200 | kodak_elite_chrome_400 | kodak_elite_color_200 | kodak_elite_color_400 | kodak_elite_extracolor_100 | kodak_hie_(hs_infra) | kodak_kodachrome_200 | kodak_kodachrome_25 | kodak_kodachrome_64 | kodak_portra_160 | kodak_portra_160_+ | kodak_portra_160_++ | kodak_portra_160_- | kodak_portra_160_nc | kodak_portra_160_nc_+ | kodak_portra_160_nc_++ | kodak_portra_160_nc_- | kodak_portra_160_vc | kodak_portra_160_vc_+ | kodak_portra_160_vc_++ | kodak_portra_160_vc_- | kodak_portra_400 | kodak_portra_400_+ | kodak_portra_400_++ | kodak_portra_400_- | kodak_portra_400_nc | kodak_portra_400_nc_+ | kodak_portra_400_nc_++ | kodak_portra_400_nc_- | kodak_portra_400_uc | kodak_portra_400_uc_+ | kodak_portra_400_uc_++ | kodak_portra_400_uc_- | kodak_portra_400_vc | kodak_portra_400_vc_+ | kodak_portra_400_vc_++ | kodak_portra_400_vc_- | kodak_portra_800 | kodak_portra_800_+ | kodak_portra_800_++ | kodak_portra_800_- | kodak_t-max_100 | kodak_t-max_3200 | kodak_t-max_400 | kodak_tmax_3200 | kodak_tmax_3200_+ | kodak_tmax_3200_++ | kodak_tmax_3200_- | kodak_tri-x_400 | kodak_tri-x_400_+ | kodak_tri-x_400_++ | kodak_tri-x_400_- | light_blown | lomo | lomography_redscale_100 | lomography_x-pro_slide_200 | mono_tinted | mute_shift | muted_fade | natural_vivid | nostalgic | orange_tone | pink_fade | polaroid_664 | polaroid_665 | polaroid_665_+ | polaroid_665_++ | polaroid_665_- | polaroid_665_-- | polaroid_665_negative | polaroid_665_negative_+ | polaroid_665_negative_- | polaroid_665_negative_hc | polaroid_667 | polaroid_669 | polaroid_669_+ | polaroid_669_++ | polaroid_669_+++ | polaroid_669_- | polaroid_669_-- | polaroid_669_cold | polaroid_669_cold_+ | polaroid_669_cold_- | polaroid_669_cold_-- | polaroid_672 | polaroid_690 | polaroid_690_+ | polaroid_690_++ | polaroid_690_- | polaroid_690_-- | polaroid_690_cold | polaroid_690_cold_+ | polaroid_690_cold_++ | polaroid_690_cold_- | polaroid_690_cold_-- | polaroid_690_warm | polaroid_690_warm_+ | polaroid_690_warm_++ | polaroid_690_warm_- | polaroid_690_warm_-- | polaroid_polachrome | polaroid_px-100uv+_cold | polaroid_px-100uv+_cold_+ | polaroid_px-100uv+_cold_++ | polaroid_px-100uv+_cold_+++ | polaroid_px-100uv+_cold_- | polaroid_px-100uv+_cold_-- | polaroid_px-100uv+_warm | polaroid_px-100uv+_warm_+ | polaroid_px-100uv+_warm_++ | polaroid_px-100uv+_warm_+++ | polaroid_px-100uv+_warm_- | polaroid_px-100uv+_warm_-- | polaroid_px-680 | polaroid_px-680_+ | polaroid_px-680_++ | polaroid_px-680_- | polaroid_px-680_-- | polaroid_px-680_cold | polaroid_px-680_cold_+ | polaroid_px-680_cold_++ | polaroid_px-680_cold_++_alt | polaroid_px-680_cold_- | polaroid_px-680_cold_-- | polaroid_px-680_warm | polaroid_px-680_warm_+ | polaroid_px-680_warm_++ | polaroid_px-680_warm_- | polaroid_px-680_warm_-- | polaroid_px-70 | polaroid_px-70_+ | polaroid_px-70_++ | polaroid_px-70_+++ | polaroid_px-70_- | polaroid_px-70_-- | polaroid_px-70_cold | polaroid_px-70_cold_+ | polaroid_px-70_cold_++ | polaroid_px-70_cold_- | polaroid_px-70_cold_-- | polaroid_px-70_warm | polaroid_px-70_warm_+ | polaroid_px-70_warm_++ | polaroid_px-70_warm_- | polaroid_px-70_warm_-- | polaroid_time_zero_(expired) | polaroid_time_zero_(expired)_+ | polaroid_time_zero_(expired)_++ | polaroid_time_zero_(expired)_- | polaroid_time_zero_(expired)_-- | polaroid_time_zero_(expired)_--- | polaroid_time_zero_(expired)_cold | polaroid_time_zero_(expired)_cold_- | polaroid_time_zero_(expired)_cold_-- | polaroid_time_zero_(expired)_cold_--- | purple | retro | rollei_ir_400 | rollei_ortho_25 | rollei_retro_100_tonal | rollei_retro_80s | rotate_muted | rotate_vibrant | rotated | rotated_crush | smooth_cromeish | smooth_fade | soft_fade | solarized_color | solarized_color2 | summer | summer_alt | sunny | sunny_alt | sunny_rich | sunny_warm | super_warm | super_warm_rich | sutro_fx | technicalfx_backlight_filter | vibrant | vibrant_alien | vibrant_contrast | vibrant_cromeish | vintage | vintage_alt | vintage_brighter | warm | warm_highlight | warm_yellow | zilverfx_b_w_solarization | zilverfx_infrared | zilverfx_vintage_b_w }