As far as I can tell the actionable part of that thread is Dima's 
suggestion to use the function set_gap_memory_pool_size() from 
interfaces/gap.py but as I pointed out above, that function has disappeared 
from sage-9.5 onwards.

Best,
Alex

On Tuesday, June 21, 2022 at 1:06:15 PM UTC+10 Nils Bruin wrote:

> Perhaps this message (see the thread it's in for context) applies to your 
> situation?
>
> https://groups.google.com/g/sage-devel/c/ntuqDmruI8w/m/vJOv6mgqCgAJ
>
> On Monday, 20 June 2022 at 19:30:04 UTC-6 AlexGhitza wrote:
>
>> Thanks, John.
>>
>> But, I should have mentioned that we tried that and it does not seem to 
>> work (unless I'm missing something):
>>
>> ┌────────────────────────────────────────────────────────────────────┐
>> │ SageMath version 9.6, Release Date: 2022-05-15                     │
>> │ Using Python 3.10.3. Type "help()" for help.                       │
>> └────────────────────────────────────────────────────────────────────┘
>> sage: gap("GAPInfo.CommandLineOptions;")
>> rec(
>>   [... redacted ...]
>>   o := "2g",
>>   [... redacted ...]
>> )
>> sage: sage.interfaces.gap.gap_cmd = 'gap -r -o 128G'
>> sage: gap("GAPInfo.CommandLineOptions;")
>> rec(
>>   [... redacted ...]
>>   o := "2g",
>>   [... redacted ...]
>> )
>> On Tuesday, June 21, 2022 at 10:59:38 AM UTC+10 John H Palmieri wrote:
>>
>>> According to 
>>> https://ask.sagemath.org/question/61829/how-to-deal-with-gaperror-error-reached-the-pre-set-memory-limit/,
>>>  
>>> try "sage.interfaces.gap.gap_cmd = 'gap -r -o 4G '".
>>>
>>> On Monday, June 20, 2022 at 5:12:27 PM UTC-7 AlexGhitza wrote:
>>>
>>>> Hi,
>>>>
>>>> I'm trying to help out a friend who is computing automorphism groups of 
>>>> lattices in Sage (using GAP under the hood).  The computation is fairly 
>>>> long and memory-intensive and eventually results in
>>>>
>>>>   sage.libs.gap.util.GAPError: Error, reached the pre-set memory limit
>>>>   (change it with the -o command line option)
>>>>
>>>> Apparently, until late last year, achieving the desired -o command line 
>>>> option effect from within Sage was possible via something like
>>>>
>>>>   from sage.interfaces.gap import get_gap_memory_pool_size, 
>>>> set_gap_memory_pool_size
>>>>   memory_gap = get_gap_memory_pool_size()
>>>>   set_gap_memory_pool_size(9048*memory_gap)
>>>>
>>>> Now these functions are not available anymore, due to 
>>>> https://trac.sagemath.org/ticket/32656
>>>>
>>>> Is it possible to achieve the same effect via some alternative method?
>>>>
>>>> Best,
>>>> Alex
>>>>
>>>

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