"I inherited a Gogo pen, but no cartridges. Do I need to purchase empty cartridges, or does your product come in a cartridge ready to attach and go?"
Hi there! W Vapes typically sells pre-filled cartridges that fit a 510 battery. You might be able to use one of the W vapes cartridge with your battery, but I would contact the product manufacturer to be sure: https://www.gogovape.com/contact.html
I have a Kandy Pens battery that looks similar to your Gogo battery and I have used prefilled cartridges with it before.
If you want to take a look at W Vapes products, you can check them out here: https://wvapes.com/cartridges/
They also have disposable options, so if their cartridges don’t work with your battery, you could purchase a disposable pen that you toss once you’re done with it.
I hope that helps!