I-gThumb sisijongi somfanekiso sasimahla kunye nesivulelekileyo kunye nomququzeleli wemifanekiso onokukhetha ukuhlela imifanekiso. Yenzelwe ukuba ibe ne-interface ecocekileyo nelula yomsebenzisi kwaye ilandela i-GNOME HIG, idibanisa kakuhle kunye ne-desktop ye-GNOME ye-desktop.