Hello and welcome to the GT community! What specific questions do you have about a new gecko? How to house two together? Where to get a second one? Lay it all out for us!
Well I have a leopard gecko. I believe it's a male but he/she is still a bit too small for me to tell. I would like to get another one just don't the right way to introduce them. What size tank would be best to house 2. If there is a quarantine period
Definitely go with a quarantine period. I'd probably want at least a 30 gallon tank to house two together. You want to give them plenty of room so there isn't any chance of quarreling.
You will need to figure out whether the gecko you have is a male or a female before putting them together (not to mention the quarantine). If your current gecko is male, it will have to stay alone since males will fight and a male and female will breed. IN any case, you should be prepared to house separately if necessary even if both the geckos are female in case they don't get along.