I found the following blurbs about the
September issue of Dragon Magazine (which went on sale July 19).

「天地無用」梶島正樹描き下ろしポスター


This is a Tenchi poster in the magazine (if I understand it
right).


お待たせ！「天地無用」＆「リアルバウト・ハイスクール」特集

　　ファンタジア文庫のロング・シリーズ2作品を特集！


This is a special feature about Tenchi Muyo and Real Bout High
School.  Beyond that, I found no information so I don't know if
"GXPS" is discussed or not.  I'm still looking and I'm
trying to score a copy of the magazine (or find someone who has one).

-ANB

-- 
AstroNerdBoy's Anime/Manga/Japan Blog
http://astronerdboy.blogspot.com

Tenchi Muyo! FAQ
http://www.astronerdboy.com/tenchi/  

> 
> I too
have been searching and coming up with nothing. 
> 
>
Hitoshi -- I guess you haven't heard anything have you?
> 

>> That is definitely
> a possibility. After this morning I
have still found
>> nothing to
> even hint at this
"GXPS" at all. I'm guessing it's just a
>> basic
sequel to GXP. Maybe something like "GXP Saga".
>
^^;;;
>>
>> ----- Original Message -----
>>>
>>
> From: "Gregory Himes"
<gdhimes@yahoo.com>
>> To:
>
<tenchi@usagi.org>
>> Sent: Saturday, August 09, 2008
7:49
> AM
>> Subject: [tenchi:106318] Re: Dragon
Magazine doing features
> on GXPS?
>>
>>
>>>> "GXPS"
>>>
>>>> First I've heard of it and not finding
>
anything on
>>>> casual searches.
>>>>
Will have
> to start digging on the JP forums for scraps.
>>>
>>>
> Could this be a renaming of the
"Saint Knight" project?