Anime/G

Ga

 * Galaxy Angel: A gag anime baes on otaku culture, absurd humour and cute women.
 * Garo: Crimson Moon - EP10: Raikou gets shrunken and he interacts with Seimei (then she becomes a para-giantess).

Gh

 * Ghost Sweeper Mikami - EP18: "Shrinking Mikami!!". During a failed counterattack, a demon manages to shoot a dart at Mikami, which causes her to shrink. Throughout the episode, Mikami interacts with Kinu Himuro and an unnamed little girl (both playing the role of para-giantesses).

Gr

 * Ground Control to Psychoelectric Girl - OP: The opening has 4 brief GTS scenes.

Gu

 * Gunparade Orchestra - EP21: Satomi, a 186 cm girl (amazoness), imagines herself as a "giant monster" (actually she imagines herself as a perfect giantess).