Unable to reproduce this issue as submitted. If this is still an issue in the current version, please contact Esri Support Services.
解决办法
Convert the Global ID field to nvarchar.
For example:
conn= arcpy.ArcSDESQLExecute(r'Database Connections\sde_user1.sde')
conn.execute('select convert(nvarchar(50),GlobalID)from sde.user1.cities')