I have been on the Gemini, but not to those ports. I was on in January, and our ports were Singapore, Kaula Lumpa, Langkowi, Krabi, Phuket and Penang.
Im not sure what kind of advice to give, except have a brilliant time, it will be something to remember and to talk to all the staff because they are awesome people.
When are you booked for? Sorry if you've already been .. this reply is quite some time after your initial post ..
Luv to hear back! Gemini memories shuld be treasured!