Rebelsgirl,
There are things you can do to help your fish feel more confident in their new home.
Are you gt's the only fish in the tank?
If they are I recommend you add a small group of hoplo catfish.
The outgoing nature of these fish will make your gt's realise there is no reason to hide.
They make excellent tankmates for rivulatus tanks and are interesting and amusing fish in their own right.
The other thing you can do to make fish feel secure is to provide cover from above.
I recommend a few bunches of hornwart left floating on the surface.It soon spreads and provides a shelter for the fish.
Most shy fish can be a lot more out going if they feel they can't be seen from above the surface.
I would not be too alarmed by your gt's behaviour as they may still be settling in and will probably improve with time.
However rivulatus are normally quite out going and swim energetically at all levels of the tank.
If it is a practical step for you to make I would add the catfish dither fish and the cover from above.It has helped me bring shy fish on many times.
Hoplo catfish
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Hornwart is a great plant left floating to provide cover.
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