What type of visa do I need to stay in Thailand for 60 days and extend for another 30 days as a New Zealander?

I see you are ten years off age pension but I'll tell you this anyway, as a kiwi on the SCV you will qualify for age pension under the SSA between NZ and Aussie but they won't let you make it portable and take it to Thailand. Also there is a 5 year visa you can get for partners of SCV holders that allows you to bring your partner from a non SSA country in with the right to work. I'm not sure of your plans or situation but just thought I'd let you know.

Gf in thailand but haven't been there in 15 years👍👏. Was she a pen pal?

No visa needed. 60 days on visa waiver and then one 30 days extension of stay

There is no Centerlink in Thailand

Ask your girlfriend she can tell you

I'm a kiwi bro been here for a month heading back to Australia for work tomorrow, do the sixty days and do the extension ,,over that period of time you'll work it out KIA KAHA

What countries PPort do u hold best check but aussie PPort 60 days visa free

Your age?

Visa exempt will give you a 60 day entry stamp when you arrive. You can apply for a 30 day extension through your local immigration office