the GVP A4008 is a name variation of the Impact A2000 Series II HC+8, and are identical boards.
GVP Series II and 4008 SCSI-Interfaces
CN1 LED connector
US Autoboot EPROM
J5 Autobooting
CN2 50 pin SCSI connector
A2000 HC+8 Series II
SIMMS: The SIMMs must be inserted in a specific order. They go in from
the innermost (CN10) to the outermost (CN17) sockets. The outermost
socket would be the one closest to the card's edge.
SIMMS can be either 1Mb x 8 or 1Mb x 9 (parity).
J5-J9 RAM Jumpers
J4 Auto-booting
J10-12 SCSI ID Jumpers
CN1 LED COnnector
U3 Autoboot EPROM
CN2 50 pin SCSI connector
Memory SIMM Locations
.....................J5 ....J6...J7 ..J8....J9
0 NON ........ OFF OFF ON OFF ON
2 CN10-CN11 OFF ON OFF OFF ON
4 CN10-CN13 ON OFF OFF OFF ON
6 CN10-CN15 OFF OFF ON ON OFF
8 CN10-CN17 OFF ON OFF ON OFF
4 PIN POWER CONNECTOR
25-pin External SCSI Connector
50-pin Internal SCSI Connector
Do you have the GVP install disk? You need it to prep the drive.