The G Centre — gates, channels and what defines it

What the G centre is

The G centre is the identity centre — the seat, in this system’s language, of direction, love and sense of self. It is also called the Self centre, and a reader who has come across either name has arrived at the right page. It is not a motor centre: it does not generate the kind of driving force that a motor supplies to the rest of the chart.

Where the G centre sits in the body

In the bodygraph, a centre is one of nine geometric areas across which the 64 gates are distributed. Each centre is a structural unit — a place where gates sit, where channels arrive, and where the chart’s derived layers, including type and authority, are computed from the pattern of what is switched on and what is not. The G centre is one of these nine, and understanding what it does structurally means understanding it as a location in that wider circuitry rather than as a standalone trait.

The gates it carries

Eight gates sit within the G centre: 1, 2, 7, 10, 13, 15, 25 and 46. Each gate is a fixed position on the wheel of 64, not an action or a behaviour — a gate is active in a chart only if a planet occupied its precise degree range at one of the two moments a chart is calculated from, the moment of birth and the moment roughly three months prior.

A gate on its own is a potential, nothing more. It does not, by itself, define anything about the centre it sits in. Definition depends on its partner gate, at the far end of a channel, also being activated — a structural pairing rather than a psychological one. What each of these eight gates specifically describes belongs to its own page; here it matters only that they exist as the entry points through which the G centre connects outward.

What defines it

A centre is defined when a complete channel — both of its gates activated — connects it to another centre. It is undefined when no complete channel reaches it, even though at least one of its gates is switched on. It is open when none of its gates are activated at all. In everyday use, "open" and "undefined" often get used interchangeably, but they are not the same state, and the distinction matters when reading a chart precisely.

Ten channels have one end in the G centre, and each needs both its gates present before it defines anything: 1–8 and 7–31 and 10–20 and 13–33 reach the Throat; 2–14, 5–15, 10–34 and 29–46 reach the Sacral; 10–57 reaches the Spleen; 25–51 reaches the Heart. A chart in which the G centre is defined can take Self-Projected authority, though this sits within a fixed hierarchy of authorities headed by the Solar Plexus, then the Sacral, Spleen and Heart, before the G centre is considered.

How it is read

Within this system’s own interpretive account, a defined G centre is described as offering a steady, dependable quality to that part of the chart’s operation — a consistent way that identity and direction tend to hold. An undefined or open G centre is described, in the same account, as more variable, more responsive to whoever and whatever is nearby. This is worth treating as exactly that: a lens the system offers for reflection, not a finding to be taken as settled fact, and not something this page will tell any individual reader what their own configuration means.

Which of the nine centres, including this one, end up defined in any particular chart is not a matter of interpretation at all — it is computed directly from a birth date, time and place, and that calculation is available free through the chart tool.