A personal Gmail account cannot receive DMARC aggregate reports, even if it is listed as the RUA address in your domain’s DMARC record. This is because DMARC requires external verification for email addresses with external domains (for example gmail.com) specified in the RUA or RUF tags. Without this verification, the email address is not authorized to receive reports.
If you add a personal Gmail address to the DMARC record, you will encounter an external verification failure warning:
Since there is no access to the gmail.com domain’s DNS records, it will not be possible to fix the external verification failure issue and receive reports to a personal Gmail account.
For more comprehensive guidance about External verification failures, refer to this article.