The minimum resolution for CU*BASE GOLD is 1024x768.  This is for the “Standard” screen size.  Starting with the 20.07, we will be supporting select additional screen sizes as well.  (See the related item below for more information about available GOLD screen sizes.)
Depending on the size of the monitor, even for the “standard” size a higher resolution will work, but the CU*BASE GOLD screen will be smaller and will not fill the entire monitor frame.  Note:  That can be still helpful, though, such as when viewing our training videos and online learning courses, so you can see the entire GOLD screen but still have space surrounding it to see the additional elements related to the training media itself.