To be able to upgrade that version GSE - I would strongly recommend to install E2007 SP2 or SP3.
For GSE upgrade would recommend minimum GSE701 Patch1RollUp2 (GSE701P1RU2) which is available for download with your grant number.
On Servers hosting HUB role we would require that E2007 SP1 RU4 installed absolute min - but recommend at least SP2.
For the latest version of MSME + its Patch 1 minimum requirement before install is E2007 SP2.
Installation Guide Page 9 has minimum system requirements - https://kc.mcafee.com/corporate/index?page=content&id=PD23277
Ok you could go to GSE701P1RU2 and since you already have HF551487 - you could run P1RU2_without_DBMigration.exe package - so please have a look at the readme inside the zip package you download or check out https://kc.mcafee.com/corporate/index?page=content&id=PD23410
But this Exchange Server detail does not meet min sys requirements for installing latest version - MSME.