Hello Raffaella,
Thank you for contacting us.
GoodSuccess is an opt-in program which has to be activated. I would recommend talk about it with your Account Owner.
And, about Pendo, we do not provide support for this use-case. We do however support embedding web content. But we also have our GoodData.UI, where you can build your own dashboards and which you could incorporate anything you would like to. For example, Pendo. For more details please see the below documentation:
https://sdk.gooddata.com/gooddata-ui/
Please, let me know if you need further assistance.