The GC-PX100 supports an SDXC memory card which is better than most camcorders of this type and age. Most big sensor size video cameras that were launched around the same time as it support an SDHC memory card. This video camera also supports an SD memory card. SDXC cards are SD cards but with a much higher capacity and faster processing speeds. They have a maximum capacity of 2TB (Terabytes).
An SDXC memory card is in fact the best supported memory card type amongst all video cameras of a similar spec and age to the GC-PX100.
The worst supported memory card type across similar types of video camera is MS Pro-HG.
SDHC cards are DS cards with a higher capacity of up to 32GB.