On a smaller gas giant you could build a floating platform (like a giant zeppelin) and launch from there. Because gas giants are so large the “surface” gravity at the altitude such a platform would be floating at is not as high as you might expect. On Uranus and Neptune it’s actually lower than 1G.

However, past Jupiter size the mass keeps increasing while the radius doesn’t, so even from a floating platform you’re contending with multiple G’s.