Can you use the round bonus tile which gives you +3 range in order to send out a gaiaforming space ship? (Or only for building mines?)
See the description of the tile in the rules (at the bottom of page 23):
During the income phase, charge two power. As a special
action, you can take a “Build a Mine” action or “Start a
Gaia Project” with your basic range increased by three. The
normal rules for the actions apply. This action cannot be
combined with another action.