Reposting a question from a user:
Hi, I’m not able to access all relevant Gusto data including pay stubs and full PTO fields.
Hi,
Thank you for the question!
It is always possible to add new datasets or metrics in our platform based on the requirement of the client. In this case, I can see that both the datasets that the poster mentions, are available in our platform.
Pay Stubs → They can check this dataset Employee Pay Stubs (SS below).
Here is the API reference - Employee Pay Stubs
PTO fields → available in this dataset: Employee Time Off Activities (SS1 below).
Here is the API reference - Employee Time Off Fields
If the user is not able to find some information in our platform that is available via the API, please let us know and we can add it accordingly. Thank you! 
Note: Regarding the Pay Stubs dataset, most of the data from this endpoint is accessible in the Payrolls endpoint (reference, here). So, please use this dataset, which is already available on our platform (screenshot below)
If the pay stubs endpoint is required, please explain why. We will then discuss this with Gusto to provide us with the necessary scope to extract the data from this endpoint. Thank you!