Yes, you are eligible to apply for UGC NET. IMT Ghaziabad CDL offers PGDM that is AICTE approved and equivalent to MBA. So, you can appear for UGC NET, if you are pursuing a PGDM distance learning from IMT Ghaziabad. Naturally, you need to fulfill the other eligibility criteria like the required percentage in masters.
One of my friends is from IMT Ghaziabad. Let me share the information I gathered from him. This might give you a basic idea about your query.
If the institution you are in has the membership of AIU, then your PGDM will be equivalent to MBA and you will be capable of appearing for the UGC NET exams.