Thank you for your inquiry.
Generally any gcc compatible SDK can be used with Embedded Studio.
For Nordic SDK related questions we recommend contacting the Nordic forums as this forum is not actively monitored by Nordic staff.
Please read the forum rules before posting: Forum Rules
Keep in mind, this is not a support forum. Its main purpose is user to user interaction.
Our engineers will try to answer your questions between their projects if possible but this can be delayed by longer periods of time.
Should you be entitled to support contact us per e-mail.
Alternatively our support ticketing system can be used as well: segger.com/ticket/